FIELD: agriculture, in particular, postharvest treatment of grain before laying for storage. SUBSTANCE: method involves treating grain with flow of propionic acid aerosol passed through ultrasonic horn, said propionic acid including additive of chitosan. Source of chitosan for adding into propionic acid is preparation obtained from Mortierella reticulata micromycet biomass produced by predetermined process. EFFECT: reliable grain storage. 2 ex
